Walking treadmill



FIG. 1 is a perspective view of a walking treadmill showing my new design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a rear elevation view thereof;

FIG. 4 is a left side elevation view thereof;

FIG. 5 is a right side elevation view thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is a bottom plan view thereof;

FIG. 8 is a rear, left, top side perspective view thereof; and,

FIG. 9 is a perspective view thereof, showing the walking treadmill in a state of use.

The broken lines shown in the figures are for the purpose of illustrating portions of the walking treadmill, which form no part of the claimed design. 

CLAIM The ornamental design for a walking treadmill, as shown and described. 